hendrich



' A. HENDRIOH.

WOOD TURNING LATHE.

No. 590,222. Patented Sept 21,1897.

Ix (No Model) 2 Sheets-Sheet 1.

fig. 7,

@mmumuum (No Model.) 2 Sheets-Sheet 2. A. HENDRIGH. WOOD TURNING LATHE.

Patented Sept. 2.1, 1897.

AUGUST IIENDRICH, OF CEDAR FALLS, IO\VA,ASSIGN-OR TO HIMSELF, JOHN \V.PIIILPOT, AND JEFFREY G. PACKARD, OF SAME PLACE.

WOOD-TURNING LATHE.

SPECIFICATION forming part of Letters Patent No. 590,222, datedSeptember 21, 18497. Application filed November 30, 1896. Serial No.613,956. (No model.)

To all whom it may concern:

Be it known that I, Aucusr HENDRICH, a citizen of the United States ofAmerica, and a resident of Cedar Falls, in the county of 5 Black Hawkand State of Iowa, have invented a new and useful Improvement in ood-Turning Lathes, of which the following is a specification.

The object of this invention is to provide improved means for turningsmall or slender objects. 1

A further object of this invention is to pro vide improved means forretaining a slender object and holding the same against the rer sistanceoffered by a cutting-knife, and this application should be read inconjunction with another application for Letters Patent of the UnitedStates executed concurrently herewith, which shows part of the elementsdelineated herein.

My invention consists in the construction,

arrangement, and combination of elements hereinafter set forth,pointedout in my claims,

and illustrated by the accompanying draw- 2 5 ings, in which Figure 1 isa plan illustrating the novel portions of my machine. Fig. 2 is asectional plan of the device shown in Fig. 1 in combination with a stickof material being operated upon. Fig. 3 is an elevation, partly insection, of my device.

In the construction of the machine, or rather the portions of itillustrated in the drawings and by me claimed as my invention,

5 the numeral 10 designates a head arranged to travel longitudinally ofa rack 11. The head 10 may be mounted for travel by machine or handpower on the bed-plate of any lathe of common construction, and sincelathes carrying traveling heads are old and well known in this art Ihave not deemed it advisable to illustrate the same. The rack 11 isstationary, or, in other words, is to be mounted rigidly upon thestationaryportion, table, or base of the lathe. Seats are formed in theupper and lower portions of the head 10, as illustrated in Figs. 1 and 2and by dotted lines in Fig. 3, and pairs of said seats, the members ofwhich aline with each other, are employed successfully, as hereinafterdescribed.

Mounted in one of the seats in the lower portion of the head 10 is astep 12, and said step may be mounted in either of the other seats insaid portion of the head 10, if desired. A shaft 13 is steppedin avertical plane in the step 12 and hasa centering-pin 14 stepped in itsupper end in the axial plane of the step 12, which centering-pin isseated in the aperture or seat of the upper portion of the headlO,alining with the seat occupied by the step 12 in the lower portion ofsaid head. A pinion 15 is mounted upon the upper end portion of theshaft 13 and meshes with the toothed face of the rack 11. A knife-heador hub 16 is mounted on the central portion of the shaft 13 and is heldthereon by means of a set-screw 17, traversing said hub and impingingagainst the periphery of the said shaft. The lower portion of theknife-head or hub 16 is recessed annularly, and mounted in the recessthus formed is an annular cutter or knife 18, which knife is formed infour sections, as shown in Fig. 2 and indicated by the symbols 18, 18",18, and 18*. Each of the sections of the knife 18 is fixed to the knife-head or hub 16 by screws 19. The lower margin of the cutter or knife 18is formed as a cutting edge beveled inwardly and made sinuous, asillustrated in Fig. 2. 8o

Mounted in the lower portion of the head 10 and secured therein by meansof a setscrew 20 is aretaining-head 21, and a retaining, backing, andguiding tube 22 is formed on and extended axially from the saidretaining-head. The head 21 and tube 22 are axially and coincidentlybored, and the said head carries a roughing-knife 23. A portion of thehead 21 and tube 22 is cut away, as illustrated by the unshaded portionthereof within and adjacent to the annular knife in Fig. 2, and the saidmembers are so mounted relative to the annularknife as that the orbit ofthe cutting edge of said knife intersects the bore in said head andtube.

In practical use the head 10, carrying the cutting mechanism andconnected members is mounted for travel on a lathe-table. A stick orsection of wood 24 to be operated upon is mounted in a lathe-chuck (notshown) and rotated at a high rate of speed. The head 10 is advancedtoward one end of the stick 24 until said end of said stick enters thebore of the retaining-head 21, which is formed with a bell-shaped mouthto receive it. The end of the stick is turned down to enter the bore bythe roughing-knife 23, and in the further advancement of the head 10 andmembers carried thereby the said stick is fed through the bore of thehead 21 and tube 22. As the stick 24: is fed through the head "21 andinto the bore of the tube 22 it contacts with the cutter 18, whichcutter is rotating by reason of the meshing engagement of the pinion 15with the rack 11. Because of the stationary positioning of the rack 11and the traveling arrangement of the axis of the pinion 15, when thesaid pinion meshes with the said rack it will be rotated thereby.

It will be observed that the cutter 18 rotates slowly relative to therotation of the stick 24, and therefore when the said stick contactswit-h the said cutter it will be turned down and into a form circular incross-section, and owing to the slower rotation of the cutter and thesinuosity of the cutting edge the stick 24 when turned will present asinuous profile.

By causing the stick 2 1 to be fed against the tangent of the cutter 18I provide that the edge of said cutter will make a shear out on saidstick, as it is very desirable in the turning of wooden substances.

By forming the cutter 18 in sections I am enabled to construct themabsolutely indentical in form, shape, appearance, strength, and temperand grind or repair the same with great convenience, whereas were I toform the cutter of a single piece having a sinuous edge it would bealmost impossible to temper the same uniformly throughout and stillmaintain the annular formation, for the reason that in tempering themetal is inclined to warp and shrink unevenly.

It sometimes occurs that it is desirable to employ a knife or cutter oflarger circumference in order that a greater distance in the length ofthe stick of material to be acted upon may be turned in a given travelof the head 10, and in such an event I would employ a larger knife and apinion 15 coincident in diameter therewith and step the shaft 13 in oneor the other of the other seats, as illustrated by dotted lines in Fig.3.

I claimas my invention 1. In a machine of the class described a traveling head comprising an annular rigid frame 10, which frame is providedwith two or more pairs of alining seats or journal-bearings in its upperand lower bars, a shaft 13 arranged. in one or another of the pairs ofalining seats, a cutter mounted on said shaft and means for rotatingsaid shaft.

2. In a machine of the class described a fixed rack, a rigid annularframeor head 10 provided with a bearing opening to its interior toreceive and slidingly engage said rack, the teeth of the rack facing tothe interior of the frame, a head 21 mounted rigidly in said frame 10, atube 22 rigidly connected with the head 21 and extended to the rear ofthe frame 10, which head and tube are axially bored to receive arevolving stick to be operated upon, a roughing-knife 23 mounted at theinitial end of the bore of the head to reduce the stick before itsentrance thereto, a plurality of seats in the top bar of the frame 10, aplurality of seats in the bottom bar of the frame 10 the axes of thelatter seats alining with the axes of the former seats, a shaft 13mounted for rotation in one or the other of the upper seats in theframe, a step 12 mounted in one or the other of the lower seats of theframe and provided with a concave upper end to receive a convex lowerend of the shaft 13 for rotation therein, a gear 15 rigidly connectedwith the shaft 13 and meshing with the rack 11, a hub 16 adjustablymounted upon the shaft 13 and shoulders in its periphery, an annularcutter 18 diametrieally divided and mounted on the hub 16 beneath theshoulders thereof, the lower margin of the cutter 18 forming acontinuous cutting edge extended to and intersecting the bore of thehead 21 and tube 22.

AUGUST IIENDRIOH. Vitnesses:

J. W. PHILPQT, J. G. PACKARD.

